The Kalo Shop stick pin with faceted citrine

The Kalo Shop
stick pin with a bezel set faceted stone
Chicago, Illinois
sterling silver, citrine
stamped marks
1.8 dwts
face: 5/8"w x 5/8"h; 2 11/16"l

Provenance:
The Paul & Terry Somerson Collection of 20th and 21st Century Metalwork and Jewelry
Condition Report: Light surface scratches, typical of age, use and polishing. Stone with some extremely minor roughness along facet edges, typical of age and use - only visible when examining under a loupe. Some bends to the pin. Stamped: Sterling Kalo.